Income Taxes (Narrative) (Details)	3 Months Ended	6 Months Ended
Jun. 28, 2026	Jun. 29, 2025	Jun. 28, 2026	Jun. 29, 2025
Income Tax Disclosure [Abstract]
Blended federal and state statutory income tax rate	26.00%	26.00%	26.00%	26.00%

Blended federal and state statutory income tax rate.

No definition available.

Name:	blmn_BlendedFederalAndStateStatutoryIncomeTaxRate
Namespace Prefix:	blmn_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration